In 2004, an ambitious online project was conceived whereby 60 bootleg artists were asked to make a minute-long mash of the previous contributor's track, to be spliced together into one continuous mix. Sadly, it was an organisational nightmare, with the patchy Boot in 60 Seconds album, featuring just 30 artists, only emerging in March this year (get it from here.

However, it did at least inspire an excellent new mash-up album, 72, available to download free from here. For this pass-the-parcel project, 11 bootleggers were each given 72 hours to add to the previous track and then send it on. The result is 72 minutes of inspired sonic alchemy, crafted from more than 200 tracks. Listen out, in particular, for Liverpool FC's Anfield Rap backed by Bill Withers; Usher crooning to the Benny Hill theme; and Lady Sovereign spitting rhymes over ZZ Top. Not every mix is technically perfect, but it's terrific fun.

Remix fans are the target market for a new audio format, MXP4. The idea of the interactive format is that, unlike standard MP3s, downloaded songs will contain multiple tracks, allowing listeners to turn off parts of the song or switch between different versions. MXP4's creators, Musinaut, have secured loads of funding, but the hard part is going to be convincing listeners that the format is something they want.

To that end, Musinaut have been promoting the format with remix competitions for hot bands including Passion Pit and the Black and White Years. Curiously, though, entering the contest involves downloading MP3 song parts then creating an MP3 remix, which feels a bit like using VHS cassettes to promote DVDs. The online player that demonstrates how to switch between different remixes of the same Pony Pony Run Run track is a similarly poor advert for MXP4, as the transitions sound dreadful. The technology may be impressive, but the sales pitch needs work.

It would seem good ideas are also at a premium among mobile phone manufacturers. Hot on the heels of Sony Ericsson's foray into internet broadcasting, Pocket TV, comes Samsung's Beat, a startlingly similar online music TV show. Until September, a new episode of Beat will pop up every weekday at 4pm on bebo.com/beat, featuring chat and performances from the likes of Little Boots, Daniel Merriweather, Paloma Faith and MC Bashy. As with Pocket TV, the host is an enthusiastic young chap with fashionable hair, the tone is irreverent, and the corporate branding is subtle but inescapable. In truth, the weekly Pocket TV is the better of the two, but Beat's bite-sized daily shows are still entertaining enough to provide a worthwhile backdrop to an afternoon cuppa.